On April 2, Elpida Memory, Inc. filed a lawsuit in U.S. District Court for the Eastern District of Virginia against Infineon Technologies AG, its subsidiary Infineon Technologies North America Corp., and Best Buy Co., Inc. for infringing Elpida patents related to semiconductor integrated circuits.

In the complaint, Elpida asserts that Infineon and other defendants are engaged in infringing activities by manufacturing, using, selling, offering for sale, or importing Infineon's microcontrollers used in mobile devices.

On the same day, Elpida filed another lawsuit in U.S. District Court for the Eastern District of Virginia against Infineon Technologies AG and its subsidiary Infineon Technologies North America Corp. for infringing Elpida patents related to semiconductor devices. In that complaint, Elpida asserts that the defendants are engaged in infringing activities by manufacturing, using, selling, offering for sale, or importing Infineon's microcontrollers used in automobiles.

Elpida, in its complaints, seeks a permanent injunction enjoining the defendants from infringing the Elpida patents and damages from the defendants for the infringement.